Joint radio frequency front-end and digital back-end antijamming scheme based on a metasurface antenna array  

作　　者：Yangming LOU Liang JIN Wenyu JIANG Shuaifang XIAO 

机构地区：[1]PLA Strategic Support Force Information Engineering University,Zhengzhou,450000,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2023年第12期1739-1751,共13页信息与电子工程前沿（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.U22A2001);the Program of Songshan Laboratory(included in the management of the Major Science and Technology Program of Henan Province),China(No.221100211300-03)。

摘　　要：An array’s degree of freedom(DoF)determines the number of jamming incidents that can be managed and the antijamming performance.Conventional arrays can improve the DoF only by increasing the number of antennas.On the other hand,when the received signal is digitized,high-power jamming will reduce the number of bits used to represent the desired signal,further increasing the difficulty of back-end antijamming based on digital signal processing.In this paper,we propose a joint radio frequency(RF)front-end and digital back-end antijamming scheme based on a metasurface antenna array.The metasurface antennas can rapidly switch patterns when receiving signals,so that a single channel can be equivalent to multiple channels and increase the DoF.We use independent component analysis to estimate the channel and then optimize the array parameters under the minimum signal-to-jamming ratio constraint of each antenna.The proposed scheme works well under high-power jamming conditions by suppressing jamming at the RF front end and using a low-precision analog-to-digital converter.Simulation results show that the proposed scheme reduces the bit error rate of the received signals by one order of magnitude compared with the conventional array.

关 键 词：Antijamming Multiple-input multiple-output Metasurface antenna array Independent component analysis 

分 类 号：TN97[电子电信—信号与信息处理]